goebel



`(No Model.)

C. H. GOBBEL.

PNEUMATIG PROPELLER.

Patented Nov. 27, 1888` S/Q/m,

UNITED STATES PATENT OEEICEo CHRISTIAN H. GOEBEL, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO M. K. WARREN, OF SAME PLACE.

PROPELLER.

SPECIFICATION forming part of Letters Patent o. 393,701, dated November 27, 1888. Application filed December 12, 1887. Serial No. 257,646. (No model.) l

To all whom it may concern/.-

Be it known that I, CHRISTIAN H. GOEBEL, a citizen of the United States, residing in the city and county `of Philadelphia, State of Pennsylvania, have invented a new and useful Improvement in Pneumatic Propellers, which 'improvement is fully set forth in the following specification and accompanying drawings.

Myy invention consists of improvements in pneumatic propellers, as follows: First, the

piston adapted to be opened so as to admit of the passage of air through the same, whereby the car or vehicle may be readily stopped; and, next, of novel means for opening and closing the gates of the slot.

Figure 1 represents a top or plan view of a pneumatic propeller embodying my invention. Fig. 2 represents a transverse vertical section thereof. f Fig. 3 represents a longitudinal vertical section thereof'. Fig. 4 represents a face view of one of the heads of the piston. Fig. 5 represents a face view of a supplementary head of the piston. Fig. 6 represents a longitudinal section of a portion on line w x, Fig. 5.

Similar letters of reference indicate corresponding parts in the several figures.

Referring to the drawings, A represents a pneumatic tube; B, the slot thereof; C, the

grip-arm; D, the piston; E, the piston-rod,v

and F the securing-nut of the piston. Freel encircling the rod E is a sleeve, G, which has secured to it a head, H, which occupies a position against the inner side of the piston D, it being noticed that said head and piston are perforated, the perforations being adapted to register when the head is properly rotated.

The arm C has at its lower .end the bosses C', which freely encircle the sleeve G, and has a vertical slot, J, in which is partly fitted a lever, K, whose lower end enters between the bosses C, and is piv'oted by a link, L, to a pro- `jection, M, on the exterior of the sleeve G, said lever having its upper end within convenient reach of the conductor or driver of the car or vehicle.

lVhen the head and pistou are in position shown in Fig. 3, the perforations of said head and piston do not register, whereby said piston is closed, and air is prevented from passing through the same, so that the piston may be operated by pressure or vacuum, as usual in propellers of this class.

Vhen it is desired to stop the car or vehicle, the lever K is depressed or raised, whereby the sleeve is rotated, the effect of which is the rotation of the vhead H and the consequent registration of the perforations thereof with those of the piston D. Air may now pass through the piston, either to escape through the slot B or enter through the same,whereby the pressure or vacuum is destroyed and the motive power of the piston ceases. When the lever is again operated, the sleeve and head are rotated, so that the perforations of the piston are covered and the piston is made airtight, and thereby becomes operative.

The gates N are horizontally supported on the upper part of the tube, so as to be movable over the slot, in order to cover and uncover the same, and are provided with rollers P, which are adapted to be engaged by the walls of a slot, Q, on the under side of a shoe, B, which is attached to the grip-arm C, said slot being shown in dotted lines, Fig. 1, it being partly oblique in opposite directions,

whereby, as the walls of the slot reach the rollers P of the gate, they bear against the same, so as to force them first outwardly and then inwardly, whereby the gates are opened to permit the passage of the grip-arm through the slot B, and then closed after the grip, so that said slot is properly covered before or after the passage of the piston, relatively to the operation of said piston, by pressure or vacuum, so that air cannot escape or enter the tube and effect said operation.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A pneumatic tube having a piston-rod with a perforated head, a sleeve encircling said rod provided with a perforated disk or head secured thereto and adapted torotate therewith, and means, substantially as described, for rotating said sleeve, said parts being combined substantially as and for the purpose set forth.

2. The tube A, with slot B, in combination 10o I), substantially as and for the purpose set forth.

4. A pneumatietube havingagrip arm with with the pistolrrod having perforated head D, the sleeve G, encircling said rod and having perforated head H, and provided with the projection M, the grip-arm C, with slotJ, andthe l a slotted shoe, R, secured thereto, substan- 5 lever K, secured to said projection M, said I tially as and for the purpose seb forth.

parts combined substantial] :1s and for the Y purpose set forth. y l C' H ('OEBET 3. The tube A, with slot 13, in combination with the griparm C, having slotted shoe R 1c attached thereto, and the gates N, with rollers 1Witnesses:

JOHN A. WIEDERSHEIM, A. P. J ENNTNGS. 

